<template>
	<view class="u-wrap">
		<view class="u-search-box">
			<view class="u-search-inner">
				<u-icon name="search" color="#909399" :size="28"></u-icon>
				<text class="u-search-text">商品搜索,共208款好物</text>
			</view>
		</view>
	<!-- 	<Search></Search> -->
		<view class="u-menu-wrap">
			<scroll-view scroll-y scroll-with-animation class="u-tab-view menu-scroll-view" :scroll-top="scrollTop">
				<view
					v-for="(item, index) in tabbar"
					:key="index"
					class="u-tab-item"
					:class="[current == index ? 'u-tab-item-active' : '']"
					:data-current="index"
					@click="swichMenu(index,item.id)"
				>
					<text class="u-line-1">{{ item.name }}</text>
				</view>
			</scroll-view>

			<block v-for="(item, index) in tabbar" :key="index.id">
				
				<scroll-view scroll-y class="right-box" v-if="current == index">
					<view class="page-view">
						<view class="class-item">
							<view class="f-banner"><image :src="item.picUrl" mode="aspectFill"></image></view>
							<view class="item-title"><u-divider :text="item.name"></u-divider></view>
							<view class="item-container">
								<view class="thumb-box" v-for="(item1, index1) in productList" :key="index1" @click="navigateTo(index1)">
									<view class="item-menu_box"><image class="item-menu-image" :src="item1.picUrl" mode=""></image></view>
									<view class="item-menu-name">{{ item1.name }}</view>
								</view>
							</view>
						</view>
					</view>
				</scroll-view>
			</block>
		</view>
	</view>
</template>

<script>
import Search from '../../components/index/Search/Search.vue';
export default {
	components:{Search},
	data() {
		return {
			// tabbar:classifyData,
			tabbar: [],
			
			productList:[],
			scrollTop: 0, //tab标题的滚动条位置
			current: 0, // 预设当前项的值
			menuHeight: 0, // 左边菜单的高度
			menuItemHeight: 0 // 左边菜单item的高度
		};
	},
	computed: {},
	onLoad() {
		this.$get(this.API.catalog)
			.then(res => {
				// console.log('分类', res);
				this.tabbar = res.data.data.categoryList; //一级
				// this.tabbar2 = res.data.data.currentCategory; //详情
				this.productList = res.data.data.currentSubCategory; //二级
				//  for(var i=0; i<this.tabbar.length;i++){ // 添加disable属性并设置为false
				//           this.$set(this.tabbar[i],'currentSubCategory',this.productList )
				//         }
				// this.tabbar.push([this.tabbar3]);
				// console.log(this.tabbar);
				
			})
			.catch(res=>{});
			
		
	},
	methods: {
		//向二级类传值
		navigateTo(index) {
			console.log(1111,this.productList[index])
			var id=this.productList[index].id
			uni.navigateTo({
				url: 'searchpage/categorySarch?id='+ id + '&index='+index		
					});
		},

		getImg() {
			return Math.floor(Math.random() * 35);
		},
		// 点击左边的栏目切换
		async swichMenu(index,id) {
			this.$get(this.API.catalogCurrent,{id:id}).then((res)=>{
				console.log(res.data)
				this.productList=res.data.data.currentSubCategory
			
			})
			if (index == this.current) return;
			this.current = index;
			// 如果为0，意味着尚未初始化
			if (this.menuHeight == 0 || this.menuItemHeight == 0) {
				await this.getElRect('menu-scroll-view', 'menuHeight');
				await this.getElRect('u-tab-item', 'menuItemHeight');
			}
			// 将菜单菜单活动item垂直居中
			this.scrollTop = index * this.menuItemHeight + this.menuItemHeight / 2 - this.menuHeight / 2;
		},
		// 获取一个目标元素的高度
		getElRect(elClass, dataVal) {
			new Promise((resolve, reject) => {
				const query = uni.createSelectorQuery().in(this);
				query
					.select('.' + elClass)
					.fields({ size: true }, res => {
						// 如果节点尚未生成，res值为null，循环调用执行
						if (!res) {
							setTimeout(() => {
								this.getElRect(elClass);
							}, 10);
							return;
						}
						this[dataVal] = res.height;
					})
					.exec();
			});
		}
	}
};
</script>

<style lang="scss" scoped>
.u-wrap {
	height: calc(100vh);
	/* #ifdef H5 */
	height: calc(100vh - var(--window-top));
	/* #endif */
	display: flex;
	flex-direction: column;
}

.u-search-box {
	padding: 18rpx 30rpx;
}

.u-menu-wrap {
	flex: 1;
	display: flex;
	overflow: hidden;
}
.u-search-inner {
	background-color: rgb(234, 234, 234);
	border-radius: 100rpx;
	display: flex;
	align-items: center;
	padding: 10rpx 16rpx;
}

.u-search-text {
	font-size: 26rpx;
	color: $u-tips-color;
	margin-left: 10rpx;
}

.u-tab-view {
	width: 200rpx;
	height: 100%;
}

.u-tab-item {
	height: 110rpx;
	background: #f6f6f6;
	box-sizing: border-box;
	display: flex;
	align-items: center;
	justify-content: center;
	font-size: 26rpx;
	color: #444;
	font-weight: 400;
	line-height: 1;
}

.u-tab-item-active {
	position: relative;
	color: #000;
	font-size: 30rpx;
	font-weight: 600;
	background: #fff;
}

.u-tab-item-active::before {
	content: '';
	position: absolute;
	border-left: 4px solid $u-primary;
	height: 32rpx;
	left: 0;
	top: 39rpx;
}

.u-tab-view {
	height: 100%;
}

.right-box {
	background-color: rgb(250, 250, 250);

	.f-banner {
		box-sizing: content-box;
		// height: 82rpx;
		image {
			width: 100%;
			height: 258rpx;
			object-fit: covers;
			border-radius: 10rpx;
		}
	}
}

.page-view {
	padding: 16rpx;
}

.class-item {
	margin-bottom: 30rpx;
	background-color: #fff;
	padding: 16rpx;
	border-radius: 8rpx;
}

.item-title {
	font-size: 26rpx;
	color: $u-main-color;
	font-weight: bold;
	.u-divider{
		margin: 0 auto;
	}
}

.item-menu-name {
	font-weight: normal;
	font-size: 24rpx;
	color: $u-main-color;
}

.item-container {
	display: flex;
	flex-wrap: wrap;
}

.thumb-box {
	width: 33.333333%;
	display: flex;
	align-items: center;
	justify-content: center;
	flex-direction: column;
	margin-top: 20rpx;
}
.item-menu_box {
	width: 120rpx;
	height: 120rpx;
	/* #ifdef H5*/
	overflow: hidden;
	border: 1px #d5d5d5 solid;
	/* #endif */
	border-radius: 50px;
	.item-menu-image {
		width: 100%;
		height: 100%;
	}
}
</style>
